Answer:
see explanation
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Sum the parts of the ratio, 3 + 3 + 6 = 12 parts
Divide 180° by 12 to find the value of one part of the ratio
180° ÷ 12 = 15° ← value of 1 part of the ratio, thus
3 parts = 3 × 15° = 45°
6 parts = 6 × 15 = 90°
Hence
∠X = ∠Y = 45° and ∠Z = 90°
